Telephone conferencing device



FIG. 1 is a top perspective view of a telephone conferencing device showing our new design;

FIG. 2 is a side elevation thereof;

FIG. 3 is a side elevation of the side opposite that shown in FIG. 2;

FIG. 4 is a front elevation thereof;

FIG. 5 is a rear elevation thereof; and,

FIG. 6 is a top plan view thereof.

The portions of the Device shown in the figures in broken lines are for illustrative purposes and form no part of the claimed design. 

The ornamental design for a telephone conferencing device, as shown and described. 